
.content {
    width: 80%;
    height: 460px;
    /*居中*/
    position: relative;
    margin: 40px auto;
    /*border: black solid 1px;*/
}

.content.contentList {
    width: 100%;
    height: 100%;
    /*变成快级元素*/
    display: block;
}

.content .contentList li {
    width: 100%;
    height: 100%;
    /*变成快级元素*/
    display: block;
    /*绝对定位*/
    position: absolute;
    top: 0px;
    left: 0px;
    opacity: 0;
}

.content .contentList li img {
    width: 100%;
    height: 100%;
    /*变成快级元素*/
    display: block;
}

/*改变一个元素节点的class属性,让他显示的更靠前*/
/*active  激活*/
.active{
    z-index: 9;
    opacity: 1 !important;
    transition: all 1s;
}


.change {
    width: 30px;
    height: 50px;
    display: block;
    position: absolute;
    top: 215px;
    /*设置元素的堆叠顺序*/
    z-index: 10;
    font-size: 30px;
    font-weight: bold;
    border-top: black solid 1px;
    border-bottom: black solid 1px;
    line-height: 44px;
    text-align: center;
    /*将鼠标变成手掌*/
    cursor: pointer;
}

.change:hover {
    /*设置透明度,零点几可以将前面的零省略*/
    opacity: .1;
}

.left {
    border-right: black solid 1px;
    left: 0;
}

.right {
    border-left: black solid 1px;
    right: 0;
}

/*添加一个遮罩层*/
.shade{
    width: 100%;
    height: 60px;
    background-color: black;
    opacity: .3;
    position: absolute;
    bottom: 0;
    left: 0px;
    z-index: 10;
}
.contentRount{
    display: block;
    margin: auto;
    height: 60px;
    width: 100%;
    line-height: 60px;
    text-align: center;
    margin-left: 5%;
}

.contentRount li{
    display: inline-block;
    height: 10px;
    width: 10px;
    /*圆角属性*/
    border-radius: 50% ;
    border: white solid 1px;
    background-color: black;
    margin-left: 10px;
    cursor: pointer;
}

.activer{
    background-color: red !important;
}
